PCN Pincer Palladium(II) Complex Catalyzed Enantioselective Hydrophosphination of Enones: Synthesis of Pyridine-Functionalized Chiral Phosphine Oxides as NC<sub>sp<sup>3</sup></sub>O Pincer Preligands
作者:Xin-Qi Hao、Juan-Juan Huang、Tao Wang、Jing Lv、Jun-Fang Gong、Mao-Ping Song
DOI:10.1021/jo5015307
日期:2014.10.17
A series of chiral PCN pincer Pd(II) complexes VI–XIII with aryl-based aminophosphine–imidazoline or phosphinite–imidazoline ligands were synthesized and characterized. They were examined as enantioselective catalysts for the hydrophosphination of enones. Among them, complex IX, which features a Ph2PO donor as well as an imidazoline donor with (4S)-phenyl and N-Tol-p groups, was found to be the optimal
Palladium-Catalyzed 1,4-Addition of Diarylphosphines to α,β-Unsaturated Aldehydes
作者:Yun-Rong Chen、Wei-Liang Duan
DOI:10.1021/ol2024339
日期:2011.11.4
A highly stereoselective asymmetric 1,4-addition of diarylphosphines to α,β-unsaturated aldehydes catalyzed by a bis(phosphine) pincer–Pd complex has been developed for the synthesis of chiral phosphines with excellent stereoselectivity (up to 98% ee) under mild conditions. The application of the current method to the synthesis of enantiopure bisphosphine and its pincer–Pd complex has also been demonstrated
Palladium(ii)-catalyzed asymmetric hydrophosphination of enones: efficient access to chiral tertiary phosphines
作者:Yinhua Huang、Sumod A. Pullarkat、Yongxin Li、Pak-Hing Leung
DOI:10.1039/c0cc00925c
日期:——
Chiral tertiaryphosphines were synthesized by asymmetric hydrophosphination of aromatic enones catalyzed by an organopalladium complex with high yields and stereoselectivity. The procedure offers practical access to chiral tertiaryphosphines.
Catalytic asymmetric synthesis of Pt- and Pd-PCP pincer complexes bearing a para-N pyridinyl backbone
作者:Esther Hui Yen Wong、Yu-Xiang Jia、Yongxin Li、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1016/j.jorganchem.2018.03.010
日期:2018.5
A diastereoselective catalytic asymmetric hydrophosphination reaction was performed using a palladacycle catalyst to produce chiral PCP phosphine ligand with high dr (95:5) and excellent enantioselectivity (>99% ee). Subsequent facile metalation of the chiral ligand with Pt and Pd metal salts yielded the desired pincercomplexes. The protonated form of these pincercomplexes was also synthesised, and
Versatile Syntheses of Optically Pure PCE Pincer Ligands: Facile Modifications of the Pendant Arms and Ligand Backbones
作者:Xiang-Yuan Yang、Wee Shan Tay、Yongxin Li、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1021/acs.organomet.5b00132
日期:2015.4.27
one-pot synthetic procedure was used efficiently to prepare the corresponding optically pure pincer complexes. All the new complexes were characterized by NMR and mass spectroscopy. The molecular structures of several selected complexes have also been elucidated by X-ray crystallography. Preliminary studies indicated that minor structural changes on these novel pincer complexes affect their chemical